Alloy



meme Feb. 11, 1936 UNITED STATES PATENT-OFFICE Y aosoass I William A. wanes, Flushing mesne assignments, to Union Carbide and Carbon Corporation, a corporation of New York No Drawing. Application July 4 Serial No. 680,561

'lClalms.

' -the addition of 0.25% to about 20% vanadium increases the life of a cutting tool made from the alloys.

The invention comprises alloys within the range of compositions given in Table A.

Table A Constituent Les than Romain A preferred range of compositions appears in Table B.

Table, B

Constituent 0. to l Substantially the remainder.

Tests have demonstrated the improved properties oi the new alloys when used as cutting 'tools. For example, a numberoi' tools containing 50 substantially 14% tungsten, 30% chromium,

2.5% carbon, 3% iron, 0.15% boron, various percentages of vanadium, and balance cobalt and small amounts of manganese and silicon were used to cut-a semi-steel billet about 8.5 inches 55 in diameter, using a cut or 0.125 inches and a feed ot 0.040 inches.

The results or several 01 these tests are given in Table 0, the length of cut in each test being expressed in inches measured along the axis of the billet. I

' Table C Tool No.

Percent V Speed oi out am r-999 \1 N Feet per minute The alloy 01 the invention is suitable not only for cutting tools, but also, in the form of a welding rod or the like, for making hard; wear resistant deposits on metal articles.-

I claim:

1. Alloy comprising substantially 1% to 4% carbon, to 35% chromium, 1.5% to 6% vanadium,10% to 30% tungsten, 0.10% to 2.5% boron,

the remainder cobalt.

2. Alloy comprising substantially 2% to 3% carbon, to 35% chromium, 1.5% to 6% vanadium, 10% to 25% tungsten, 0.10% to 0.60% boron, iron not more than about 5%, the remainder cobalt.

3. A cutting tool comprising substantially 2% to 3% carbon, 25% to 35% chromium, 1.5% to 6% vanadium, 10% to 25% tungsten, 0.10% to 0.80%

boron, iron not more than about 5%, the remainder cobalt.

4. A welding rod comprising substantially 2% to 3% carbon, 25% to 35% chromium, 1.5% to 6% vanadium, 10% to 25% tungsten, 0.10% to 0.60%

boron, iron not more than about 5%, the

mainder cobalt 5. Alloy comprising substantially 1% to 4 carbon, 10% to 35% chromium, 0.5% to 15%"vanadium, 10% to of at least one metal of the group consisting o! tungsten and molybdenum, 0.1% to 2.5% boron, 0.1% to 1% manganese, 0.1% to 1% silicon, remainder metal of the group iron,

nickel, cobalt, the nickel being not over 5%, and

the iron being not over.5%.

6. A cutting tool comprising substantially 1% to 4% carbon, 10% to chromium 15% vanadium, 10% to 30% of at least to one metal 01' the groupconsisting of tungsten and molybdenum, 0.1% to 2.5% boron, 0.1% to 1% mangangso.0J% to1% silicomremaindermetalotthe group iron, nickel, cobalt, the nickel and iron bein: not over 5% each.

'l. A weldlng'rod comprising substantially 1% to 4% cu'bon, 10% to 35% chromium, 0.5% to 15% vauad1um,'10% to 30% 01' at least one metal of the kroup ccnslstlnz dcnum, 0.1% to 2.5% boron, 0.1% to 1% manganese, 0.1% to 1% silicon, remainder metal or the group inon,-n1cke1, cobalt, the nickel and iron be-,

in; not over 5% each.

. WIILIAM of tungsten and mol'yb 

